50019209 has 2 divisors, whose sum is σ = 50019210. Its totient is φ = 50019208.

The previous prime is 50019199. The next prime is 50019217. The reversal of 50019209 is 90291005.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48511225 + 1507984 = 6965^2 + 1228^2 .

It is a cyclic number.

It is not a de Polignac number, because 50019209 - 2⁸ = 50018953 is a prime.

It is not a weakly prime, because it can be changed into another prime (50019239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25009604 + 25009605.

It is an arithmetic number, because the mean of its divisors is an integer number (25009605).

Almost surely, 2^50019209 is an apocalyptic number.

It is an amenable number.

50019209 is a deficient number, since it is larger than the sum of its proper divisors (1).

50019209 is an equidigital number, since it uses as much as digits as its factorization.

50019209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 50019209 is about 7072.4259628504. The cubic root of 50019209 is about 368.4503215311.

The spelling of 50019209 in words is "fifty million, nineteen thousand, two hundred nine".